That was the missing piece to generate proper dependencies in 32bit
packages with subpkgs that depended in other subpkgs.
For example kmod: libkmod and libkmod-devel. libkmod-devel was being processed
before libkmod, and due to missing shlib-provides a dependency to the 64bit
package was generated.
The strip-and-debug-pkgs/generate-runtime-deps hooks have been moved
to the pre-pkg stage, and are run before prepare-32bit; this way dependencies
are collected correctly in all cases.
The prepare-32bit hook has been moved to the pre-pkg stage and now
those hooks are executed as part of the install phase. That means that
pre-pkg hooks are now independently run for the subpkgs and the sourcepkg
after the install-destdir phase and pre/do/install hooks.
As bonus, finally correct rdeps can now be collected for the 32bit pkgs
and works for all them, without the need to sort the order of subpkgs!
